Zero adjustable calculator



April 12, 1966 P. SCHUMACHER 3,2

ZERO ADJUSTABLE CALCULATOR Filed Dec. 28, 1964 4 Sheets-Sheet 1 INVENTOR.

PAUL JCHUMICHE April 12, 1966 P. SCHUMACHER 3,2

ZERO ADJUSTABLE CALCULATOR Filed Dec. 28, 1964 4 Sheets-Sheet 2 I l l I INVENTOR.

, my; SCHll/VflCl/ER Jaye 4M April 12, 1966 P. SCHUMACHER 3,

ZERO ADJUSTABLE CALCULATOR Filed Dec. 28, 1964 4 Sheets-Sheet 3 INVENTOR.

A401. sun/M40152 MLM Arraka/i/ A ril 12, 1966 P. SCHUMACHER 3,245,517

ZERO ADJUSTABLE CALCULATOR Filed Dec. 28, 1964 4 Sheets-Sheet 4 INVENTOR- P40; su/uMACIEfi ihwAAQz/Q,

Arron/5) United States Patent 3,245,617 ZERO ADJUSTABLE CALCULATOR Paul Schumacher, Schweuningen am Neclrar, Germany, assignor to Firma Irion und Vosseler Zahlerfabrik, Schwenningen am Neckar, Germany Filed Dec. 28, 1964, Ser. No. 421,443 Claims priority, application Germany, Dec. 30, 1963,

10 Claims. (a. 235-144 action with the decimal carryover register wheels.

To this end, in the calculators of known construction, the decimal carryover wheels have been mounted on a frame which could be swung out of the way, i.e., when the zero-setting shaft of the zero-setting gripper was actuated and thus the decimal carryover wheels were brought out of engagement with the decimal wheels of the decimal rollers.

During the return swinging of the above-mentioned swinging frame the decimal carryover wheels do not always remain in the exact position which would assure a friction-free engagement with the gears of the counter rolls, and they may slide into a wrong angular position or against the gear of the above-mentioned gear wheels. In that case, however, the decimal carryover wheels may result in a wrong counting operation in view of the wrong angular position or blocking of the gear wheels of the counter rolls the continuous of further counting operations may be delayed. These errors are not always quickly noticed, however, because when independent calculators are used for a quantity of workpieces or certain lengths of textiles they are not watched constantly.

The purpose of the invention is to overcome these errors. It comprises counter rolls which are made of two divided parts, a roller member which is rigidly secured with the numeral rim to the heart curve and the decimal carryover is assembled with a gear wheel which is always engaged with the decimal carryover wheels and both of these parts are adapted for being coupled to one another for the counting operation and to be uncoupled from one another for a zero setting. Due to this separation the gear wheels of the roller member, which carry the counter rims and thus the counting and the indication of the achieved numerical worth, can be set back to zero without engaging the corresponding gears with the decimal carryover wheels.

Further objects of the invention will be apparent from the following description and drawings of embodiments of the calculator according to the invention.

In the drawing:

FIG. 1 is a cross-sectional view of the calculator in the zero setting;

FIG. 2 is a view from the right of a roller member of the calculator with the coupling and spring disc;

FIG. 3 shows the gear wheel of this calculator;

FIG. 4 is a view similar to that of FIG. 1 in crosssection, during the counting operation;

FIG. 5 is the calculator as seen from the left without the left housing wall;

FIG. 6 is a second embodiment of a calculator in plan view and partly in cross-section;

FIG. 7 shows the roller member of the calculator with the coupling seen from the right;

FIG. 8 shows the gear of the calculator with the corresponding roller member in a similar view;

FIG. 9 is a side view of this calculator in the zero position and FIG. 10 is a similar view of the calculator in the counting operation.

The calculator shown in FIGS. 1-5 is disposed in a housing 1 in the side walls of which there is swingably mounted an axially displaceable roller shaft 2, a supporting rigidly mounted shaft 3 for the decimal carryover wheels 4 and a zero setting shaft 5. As shown in FIGS. 1-4, the roller shaft 2 is displaceable in two positions, one of which, for a zero setting, is shown in FIG. 1 and the other in FIG. 4. During the counting operation a number of multi-part counter rolls are mounted axially non-displaceable on the roller shaft 2 and these correspond in number to the setting number. Each counter roll comprises a roller member 6, as well as a divided gear wheel 7 and includes a coupling piece 8 with axially bent arms 8a and a spreading spring 9. The gear members 6 are provided with an exteriorly mounted numeral rim 10, a lateral heart curve 11 and a double tooth for the decimal carryover and they also comprise two interior pairs of radially directed ducts disposed oppositely to one another and forming the guide slots for the arms 8a of the coupling piece 8. These arms 8a are positioned oppositely to ten diametrically over-lying equally spaced bores 14 of the corresponding gear wheels 7. The coupling pieces 8 are tensioned by the spreading spring 9 against the spring discs 15, which are mounted in the ring recesses 16 of the roller shaft 2.

The spring discs 15 press the coupling pieces 8 to the left, as shown in FIG. 1 which illustrates the engaging position of the roller shaft 2 in the zero setting ring position, so that the arms 8a are disengaged from the bores 14 of the gear wheels 7, while in the right position of the roller shaft 2 which serves for counting, as shown in FIG. 4, the spreading springs 9 press the coupling pieces 8 to the right and their arms 8a engage the gear wheels 7, with the respective bores 14. The decimal carryover wheels 4 which are always in engagement with the decimal wheels 7 are rotated during each decimal passage of the roller members 6 by their double teeth 12 about one tooth and carry over these rotations to the decimal wheels 7 of the counter rolls to the successive positions.

The zero-setting shaft 5, which may be swung by means of an adjustable key or lever, is rigidly secured to a zero setting element 17, which influences the heart curves 11 by means of swingable engaging arms 18 between the counter rolls and which can set the roller member 6 at zero. In order to uncouple these beforehand from the gear wheels 7, the zero setting shaft 5 is connected with a control member 9 which influences the axial movement of the roller shaft 2.

This control member is provided with a diagonal curved slot 12 into which extends a cross pin 21 rigidly secured to the roller shaft 2.

Two securing pins 22, 23, which are mounted in the side wall of the housing 1, flank the cross pin 21 and secure the shaft against rotation. When the zero-setting shaft 5 is swung into the zero position sense, the roller shaft 2 is therefore displaced to the left by the pin 21 which slides in the curved slot 20. Since the spring discs 16 thereby also travel to the left, they carry along the coupling pieces 8 against the force of the spreading springs 9 and the arms 8a are guided out of the bores 14 of the corresponding gear wheels 7. The roller members 6, which are non-rotatably secured to the coupling pieces 8 can be set back to zero independently of the gear wheel 7.

Should the zero setting shaft be swung in opposite engagement, then the shaft 2 of the pin 21, which slides in the slotted curve 2%, will be moved to the right. Due to the fact that the coupling pieces 3 are held in operative engagement with the spring disc 16 by means of the spread springs 9, said coupling pieces d are moved to the right with the former so that their arms 8a are guided into the corresponding bore 14 of the respective gear wheels 7. The lower members 6 are coupled with the corresponding gear wheels 7 in a form-locking manner and the counting operations may follow in proper fashion.

It is only necessary to mention that to avoid delay the curved slot of the control member 19 must be arranged in such a manner relative to the cross pin 21 of the roller shaft bearing the counting rolls, so that the actual placement of the roller shaft and thereby the engagement between the coupling roller 6 with the gear wheels 7 takes place shortly after or before the engagement of the zero setting engaging element 18 with the heart curves 11 of the roller member 6 or before its engagement.

The embodiment illustrated in FIGS. 610 similarly comprises a housing 1 in the side Walls of which there is provided a roller shaft 2 which is axially displaceaole, a rigidly secured carrying shaft 3: for the decimal carr over wheels 4 and a zero-setting shaft 5 which is swingably mounted. Here again a number of multi-part counting rollers are mounted rotatably and axially displaceable on the displaceable roller shaft 2, as shown in P16. 6, into the slot 241) in a circular recess of the roller shaft 2 and thus are rotatably but non-displaceably con nected therewith. The roller members 6 which are provided with numeral rims double teeth and heart curves 11 comprised interior diametrically opposed longitudinal slots 26 to slide the bent arms 24a of the coupling slide 24. These arms 24a can engage, as in the first embodiment into diametrically opposed bores of 10 equally spaced bores 14 of the corresponding gear wheels 7.

The Zero setting shaft 5 which is swingable in the usual manner by means of a lever extending at its left side, carries a zero-setting 17 which is rigidly connected to it. This member comprises engaging arms 18 which influence the heart curves 11 of the roller member 6 during the zero-setting period. In addition the zero-setting shaft 5 is rigidly connected with two control levers 27, 28 outside of both side walls of the housing 1, can separately come in contact with the rounded outer ends of the roller shaft 2 when it is swung and move these to the left or to the right.

The above-described calculator operates as follows:

For counting, the zero-setting shaft 5 is swung by the zero-setting lever (not shown), as shown in FIGS. 6 and 10, in such a manner that the engaging arms 18 of its zero-setting member 17 are swung out of the heart curves 11 of the roller member 6. In addition, the control lever 27, which has swung behind, has released the roller shaft 2 while the control lever 28 which has swung downwardly to the left has moved the roller shaft 2 to the right.

This roller disc has at the same time taken along the coupling pieces 24 so that they are inserted into the opposed bores 14 of the gear wheels 7, and the accompanying roller member 6 and gear wheels 7 are coupled with one another. The calculation can now begin.

Should the rolling member 6 be guided back to zero after an addition operation or after a substracting operation to a previous amount then the zero or return shaft 5, as well as the zero-setting member 17 will swing into the position according to FIG. 9 from the position shown in FIG. 10. The roller shaft 2 will first be released by means of the high swinging left control lever and then will be moved to the left by the forward swinging right control lever 27. At the same time it will pull the arms 24a of the coupling piece 24 out of the boards 14 of the corresponding gear wheels 7 and uncouple these from the roller members 6. With the further swinging of the zero or return setting shaft 5, the engaging arms 18 of the zero or return position member 17 extend into the heart curve 11 of the corresponding roller member 6 and guide these independently of the remaining gear wheels 7 which are in engagement with the decimal carryover wheels into the zero position or into a predetermined position.

I claim:

1. Zero-adjustable calculator comprising, a first shaft, heart curve elements, decimal carryover means and gear wheels provided with counter rolls rotatably mounted and axially non-displaceable on said first shaft, a second shaft in said calculator, decimal carryover wheels rotatably mounted on said second shaft, decimal carryover wheels coacting with the gear wheels of the counter wheels and with the decimal carryover means of said counter rolls to a higher position, a third manually swingable shaft, zero positioned grippers rigidly secured to said shaft, said grippers being out of engagement with the heart curves of the counter rolls, said grippers being engageable with the heart curves with the counter rolls when said shaft is displaced, said grippers being adapted to set the counter rolls in zero position, each of said counter rolls consisting of a pair of separate axially non-displaceable parts, one of said parts being rigidly secured to the roller member secured to the heart curve and to the decimal carryover means, a numeral rim being provided on said roller wheels, the other of said parts being in constant engagement with the corresponding decimal carryover wheel, the other of said wheels being in constant engagement with the corresponding decimal carryover wheel, a coupling axially displaceable at random secured to each of said two part counter rolls, said coupling being adapted for coupling the roller member and the corresponding deci mal wheel and for uncoupling said roller member and the corresponding gear wheel during a zero setting operation.

2. Calculator according to claim 1, wherein said first shaft bearing said counter rolls is displaceable for counting and for zero setting, said shaft being provided with a rigidly secured coupling, a rotatable coupling disposed between said corresponding part of the counter rolls, said first shaft being rigidly secured to the respective roller member and being in displaceable engagement with said counter roller and being displaceable out of engagement with the corresponding roller gear during the displacement of the second shaft during the counting operation or the zero corresponding Zero operation.

3. Calculator according to claim 2, wherein the couplings are provided with a pair of diametrically opposed, axially bent arms, said arms being adapted to extend between the radial rods of the roller members.

4. Calculator according to claim 3, wherein said first shaft is provided with circular recesses, spring discs in said circular recesses, said couplings being held in motive en gagement with said spring discs and spreading springs connecting said couplings and said spring discs.

5. Calculator according to claim 4, further provided with a control member, said control member having an in clined curved slot, the third shaft bearing the zero setting gripper being connected with said control member, said first shaft bearing the counter rolls being provided with a transverse pin in form-locking engagement with said curved slot.

6. Calculator according to claim 5, further provided with a housing, a pair of longitudinal pins mounted in said housing, said longitudinal pins flanking said transverse pin.

7. Calculator according to claim 6, wherein said curved slots of the control member are disposed relative to said first shaft on which said transverse pin is carried in such a manner that they influence the axial displacement and thereby the coupling of the roller members with the gear wheels shortly after the engagement of said zero setting gripper with said heart curves of said roller member.

8 Calculator according to claim 3, wherein said couplings are rotatably and non-displaceably secured to said first shaft on which said counter rolls are mounted.

9. Calculator according to claim 8, wherein said first shaft is provided with circular recesses, said couplings being displaceable in said circular recesses.

10. Calculator according to claim 9, wherein said first shaft extends outwardly of a side wall of sa d housing, and wherein there are further provided a pair of control levers, said levers being secured to said third shaft and being formed of sheet metal.

No references cited.

LEO SMILOW, Primary Examiner. 

1. ZERO-ADJUSTABLE CALCULATOR COMPRISING, A FIRST SHAFT, HEART CURVE ELEMENTS, DECIMAL CARRYOVER MEANS AND GEAR WHEELS PROVIDED WITH COUNTER ROLLS ROTATABLY MOUNTED AND AXIALLY NON-DISPLACEABLE ON SAID FIRST SHAFT, A SECOND SHAFT IN SAID CALCULATOR, DECIMAL CARRYOVER WHEELS ROTATABLY MOUNTED ON SAID SECOND SHAFT, DECIMAL CARRYOVER WHEELS COACTING WITH THE GEAR WHEELS OF THE COUNTER WHEELS AND WITH THE DECIMAL CARRYOVER MEANS OF SAID COUNTER ROLLS TO A HIGHER POSITION, A THIRD MANUALLY SWINGABLE SHAFT, ZERO POSITIONED GRIPPERS RIGIDLY SECURED TO SAID SHAFT, SAID GRIPPERS BEING OUT OF ENGAGEMENT WITH THE HEART CURVES OF THE COUNTER ROLLS, SAID GRIPPSERS BEING ENGAGEABLE WITH THE HEART CURVES WITH THE COUNTER ROLLS WHEN SAID SHAFT IS DISPLACED, SAID GRIPPERS BEING ADAPTED TO SET THE COUNTER ROLLS IN ZERO POSITION, EACH OF SAID COUNTER ROLLS CONSISTING OF A PAIR OF SEPARATE AXIALLY NON-DISPLACEABLE PARTS, ONE SAID PARTS BEING RIGIDLY SECURED TO THE ROLLER MEMBER SECURED TO THE HEART CURVE AND TO THE DECIMAL CARRYOVER MEANS, A NUMERAL RIM BEING PROVIDED ON SAID ROLLER WHEELS, THE OTHER OF SAID PARTS BEING IN CONSTANT ENGAGEMENT WITH THE CORRESPONDING DECIMAL CARRYOVER WHEEL, THE OTHER OF SAID WHEELS BEING IN CONSTANT ENGAGEMENT WITH THE CORRESPONDING DECIMAL CARRYOVER WHEEL, A COUPLING AXIALLY DISPLACEABLE A RANDOM SECURED TO EACH OF SAID TWO PART COUNTER ROLLS, SAID COUPLING BEING ADAPTED FOR COUPLING THE OTHER MEMBER AND THE CORRESPONDING DECIMAL WHEEL AND FOR UNCOUPLING SAID ROLLER MEMBER AND THE CORRESPONDING GEAR WHEEL DURING A ZERO SETTING OPERATION. 